Pfbc
[医][=pentafluoro-benzyl-chloroformate]五氟苯甲基氯甲酸酯
🗣️ 情景例句
About eight o'clock?
差不多八点钟好吗？
I tried calling you several times yesterday but I couldn't get through.
我昨天给你打了几次电话，但都没有打通。
The Hubble will tell us a great deal about the age and size of the universe.
哈勃将告诉我们有关宇宙的年龄和大小的许多事情。